Circle Vocabulary
Finding Circumference
Finding Area
Finding Diameter
Finding Radius
100
What does the area measure on a circle?
The space INSIDE the circle.
100
What is the formula for the circumference of a circle?
C = TT x d
100
What is the formula for the area of a circle?
A = TT x r^2
100
If the radius of a circle is 7.5 inches, what is the diameter?
15 inches


100
If the diameter of a circle is 25 inches what is the radius?
12.5 inches squared
200
What is does the circumference measure on a circle?
The distance around the outside of the circle or the perimeter.
200
If the diameter of a circle is 20 cm, what is the circumference?
62.8 cm
200

If the radius of a circle is 10 cm, what is the area?

314 cm
200
If the circumference of a circle is 30 mm, what is the diameter? (Round to the nearest hundredths).
9.55 mm
200

If the area of a circle is 78.5 mm, what is the radius? (Round to the nearest hundredths).

5 mm
300
What symbol and name do we use for the number 3.14?
Pi             TT
300
If the diameter of a circle is 15.5 ft., what is the circumference? (Round to the nearest hundredth).
48.67  ft.
300
If the radius of a circle is 14.5 ft., what is the area? (Round to the nearest hundredth).
660.19 ft. squared
300

If the circumference of a circle is 45.5 mm, what is the diameter? (Round to the nearest hundredths).

14.49 mm
300

If the area of a circle is 153.86cm, what is the radius? (Round to the nearest hundredths).

7 cm
400
What saying do we use to remember the circumference formula?
Cherry pie is delicious.
400
If the radius of a circle is 8 cm, what is the circumference? (Round to the nearest hundredth).
50.24cm
400
If the diameter of a circle is 23 cm, what is the area of the circle? (Round to the nearest hundredth).
415.27 cm squared
400

If the circumference of a circle is 100 mm, what is the radius? (Round to the nearest hundredths).

15.92 mm
400

If the area of a circle is 200.96 mm, what is the diameter? (Round to the nearest hundredths).

16 mm
500
What saying do we use to remember the area formula?
Apple pies are too.


500
If the radius of a circle is 19.5 cm, what is the circumference of the circle? (Round to the nearest hundredth).
122.46cm
500
If the diameter of a circle is 34 in., what is the radius? (Round to the nearest hundredth).
907.46 inches squared
500

If the circumference of a circle is 120.5 mm, what is the radius? (Round to the nearest hundredths).

19.19 mm
500

If the area of a circle is 28.26 ft, what is the diameter? (Round to the nearest hundredths).

3 feet
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